Grand Slam Alpharetta is an indoor ⚾ 🥎training facility located in the heart of Alpharetta, GA. We OFFER private lane rental, team rentals, 3 ⚾ pitching machines, 2 🥎pITCHING MACHINES, HitTrax, professional lessons, memberships, speed, strength, and agility classes — everything players need to train hard, improve their game, and reach their full potential.